Coupling gasket



Mar. 5, 1929'' FARMER 1,703,874

COUPLING GASKZI Filed 1927 INVENTOR CLYDE ARMER BY I ATT EY 20 equalized. When the coupling heads are un- With the pressure of the fluid in conduit 2, so

Patented Mar. 5,1929. I r I 1,703,874

UNITED STATES PATENT OFFICE.

CLYDE G. FARMER, OI PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO THE WESTING- HOUSE AIB BRAKE COMPANY, OF WILMEBDING, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

COUPLING GASKET.

Application filed January 4, 1927. Serial No. 168,936.

This invention relates to hose couplings radial grooves 5, adapted to connect the anand more particularly to a hand operated hose nular cavity 7, at the rear of the gasket flange, coupling of the type commonly employed for with conduit 2. connecting the fluid pressure brake pipe be- In operation, when two counterpart hose 5 tween railway cars. 7 coupling heads are connected together and The usual hose coupling head is provided conduit 2 is charged with fluid under preswith an annular recess adapted to receive the sure, the asket 4 acts in the usual manner to annular flange of a flexible gasket, said gaseflect a tlght seal between the counterpart ket being employed to effect a tight seal becoupling heads. The fluid under pressure in 50 tween two counterpart coupling heads. conduit 2 equalizes through the grooves 5 in Fluid under pressure in the conduit of the the gasket flan e into the annular cavity 7 'hose coupling head, acting on the inner wall back of the gasket flange. of the standard gasket tends to press the When the counterpart coupling heads are flange of said gasket into leak tight engageuncoupled, the pressure of fluid in conduit 2 55 ment with the walls of the recess, but if leakof the coupling heads is reduced to a low deage of fluid under pressure from the conduit g ce, a d cavity 7 back of the gasket flange 3 V to the annular cavity at the rear of the gasket being in constant communication With the flange should occur, then the fluid pressures c ndult 2 by Way of the radial groove5, the on opposite sides of the gasket flange become p ss e of e flui in sai i y reduces 00 coupled, the fluid pressure at the inner wall of that the opposing pressures acting in cavity 7 the gasket will be suddenly reduced to atmos- 0n the flange of the gasket and on the interior pheric pressure, and the built up pressure re- Wall 9 of the gasket remain equal and conset ained in the cavity tends to force the gasket quently, there will be no fluid pressure re- 05 inwardly and may in some cases cause the tained In the cavity 7, such as would tend to gasket to be blown out of the coupling head. blow the gask t out f it t,

The principal object of my invention is to Having now described my invention, what provide an improved hose coupling having I claim as new and desire to secure by Letters means for overcoming the above difliculty. e 8 2 r In the accompanying drawing, the single The combination with a hose coupling havfigure is a fragmentary, sectional View of mg a fluid conduit provided with an opening hose coupling head, embodying. my invenat the meeting face of the coupling and havtion. ing an annular recess adjacent to said open- As shown in the drawing, the coupling g, of a g k having all 3111111181 flange 7 head 1 has the usual air conduit 2 and is promounted in said recess and provided with a vided with an'annular recess adjacent to the groove e ng S d conduit with the remeeting face of the coupling head, and a gascess space at the rear of the gasket flange. ket 4 is provided having an annular flange 3, In testimony whereof I have hereunto set which is fitted into said recess. myhand. V

40 According to my invention, the flange 3 of the gasket 4 is provided with a plurality of v CLYDE C. F ABMER. 

